东方次睾吸虫与华支睾吸虫病原形态鉴别比较

Compare With Metorchis Odentalis and Clonorchis Sinenais on Pathogenic Morphology

目的通过对东方次睾吸虫(Metorchis odentalis)与华支睾吸虫(Clonorchis sinenais)的各期病原体形态的观察比较,为鉴别该病种提供科学依据。方法收集两种吸虫的成虫、虫卵和囊蚴,并进行形态学比较、大小测量和寄生宿主部位的观察。结果东方次睾吸虫和华支睾吸虫成虫寄生部位均为肝胆管与胆囊。幼虫囊蚴的寄生部位,华支睾吸虫主要寄生于鱼背鳍肌肉内;东方次睾吸虫囊蚴主要寄生于鱼尾鳍肌肉内。虫卵特征,东方次睾吸虫与华支睾吸虫的虫卵大小与形态极为相似,仅前者卵盖与肩峰不如后者明显,卵壳与光洁度较后者更光滑透亮。囊蚴特征:东方次睾吸虫囊壁较华支睾吸虫为厚,且成双层结构,为典型的特征性。成虫特征:华支睾吸虫虫体呈葵花仔状,东方次睾吸虫则呈叶片状。结论发现虫卵、囊蚴与成虫时,需根据形态和大小等特征加以鉴别。

Objective To provide the basis for the diferentiation with other samples through observating the morphology of Metorchis odentalis and Clonorehis sinenais. Methods Adults, egg and metacercaria of two kinds of fluke were collected. Their shape, size and habitation site were examined. Results Adult of Metorchis erientalis and Clonorchis sinensis inhabit in the bile duct. Metorchis erientalis inhabit in the muscle of tail in the fish body, Clonorchis sinensis inhabit in the muscle of back in the fish body. Besides some diferences of the top of egg and the crustaceous glabrous degree of egg, that＇s mostly like themselves. There is very thick theca wall in Metorchis odenta, and have a two - layered and typical structure. The egg of Clonorchis sinensis whose shape likes sunflower seed is bigger than the eggs of Metorchis orientalis whose likes lamina. Conclusion When counting egg, metracercaria and adult of two kinds of fluke, they must be identified depending on their characterization on size and shape.